Never played lego or in a sand box ?Good point. Don't really get that either, but kids love it. Wonder how it'll work with kids accessing perverted adult dreams. It's got to have some sort of censorship built in.
That's minecraft, it's obvious kids will love it...
Hell since exploration is the essence of most games, it's also obvious adults will like it for a while. (But they might be less interested in building with subpar tools.)
Anyway, clueless about Dreams game part, it might just be like screensavers, a nice scene or maybe a short movie...